Debian DLA-2935-1 : expat - LTS security update

critical Nessus Plugin ID 158676

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2935 advisory.

- Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)

- xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)

- xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs. (CVE-2022-25236)

- In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large nesting depth in the DTD element. (CVE-2022-25313)

- In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. (CVE-2022-25315)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the expat packages.

For Debian 9 stretch, these problems have been fixed in version 2.2.0-2+deb9u5.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1005894

https://security-tracker.debian.org/tracker/source-package/expat

https://www.debian.org/lts/security/2022/dla-2935

https://security-tracker.debian.org/tracker/CVE-2022-23852

https://security-tracker.debian.org/tracker/CVE-2022-25235

https://security-tracker.debian.org/tracker/CVE-2022-25236

https://security-tracker.debian.org/tracker/CVE-2022-25313

https://security-tracker.debian.org/tracker/CVE-2022-25315

https://packages.debian.org/source/stretch/expat

Plugin Details

Severity: Critical

ID: 158676

File Name: debian_DLA-2935.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/7/2022

Updated: 5/25/2022

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:POC/RL:OF/RC:C

CVSS Score Source: CVE-2022-25315

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:expat, p-cpe:/a:debian:debian_linux:lib64expat1, p-cpe:/a:debian:debian_linux:lib64expat1-dev, p-cpe:/a:debian:debian_linux:libexpat1, p-cpe:/a:debian:debian_linux:libexpat1-dev, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/7/2022

Vulnerability Publication Date: 1/24/2022

Reference Information

CVE: CVE-2022-23852, CVE-2022-25235, CVE-2022-25236, CVE-2022-25313, CVE-2022-25315